{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48742", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.054Z", "datePublished": "2024-06-20T11:13:26.653Z", "dateUpdated": "2026-08-05T08:52:04.588Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:04.588Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()\n\nWhile looking at one unrelated syzbot bug, I found the replay logic\nin __rtnl_newlink() to potentially trigger use-after-free.\n\nIt is better to clear master_dev and m_ops inside the loop,\nin case we have to replay it." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Triggered via RTM_NEWLINK on a local netlink/rtnetlink socket (syscall), not by remote packet processing.\nAC:L - An attacker who can issue concurrent RTM_NEWLINK operations controls both sides of the module-load unlock/replay window; CONFIG_MODULES is common and no external victim state is required.\nPR:L - RTM_NEWLINK requires CAP_NET_ADMIN checked via netlink_net_capable() against the socket netns user_ns, which an unprivileged process can obtain with user+net namespaces (unshare -Urn).\nUI:N - Exploitation needs no victim action beyond the attacker’s own netlink requests.\nS:U - Impact is privilege escalation within the same kernel authority; this is not a VM/IOMMU/sandbox boundary cross.\nC:H - Stale m_ops is a use-after-free on link-ops/module memory, which can be leveraged for arbitrary kernel reads.\nI:H - UAF of m_ops can divert control through stale function pointers (e.g. slave_changelink), enabling corruption and code execution.\nA:H - Use-after-free of master link ops reliably causes kernel oops/panic even when not fully turned into code execution." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/rtnetlink.c" ], "versions": [ { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "2cf180360d66bd657e606c1217e0e668e6faa303", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "7d9211678c0f0624f74cdff36117ab8316697bb8", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "a01e60a1ec6bef9be471fb7182a33c6d6f124e93", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "bd43771ee9759dd9dfae946bff190e2c5a120de5", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "3bbe2019dd12b8d13671ee6cda055d49637b4c39", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "def5e7070079b2a214b3b1a2fbec623e6fbfe34a", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "36a9a0aee881940476b254e0352581401b23f210", "status": "affected", "versionType": "git" }, { "version": "ba7d49b1f0f8e5f24294a880ed576964059af5ef", "lessThan": "c6f6f2444bdbe0079e41914a35081530d0409963", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/rtnetlink.c" ], "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "lessThan": "3.14", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.300", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.265", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.228", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.177", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.97", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.20", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.6", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": 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"versionStartIncluding": "3.14", "versionEndExcluding": "5.16.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2cf180360d66bd657e606c1217e0e668e6faa303" }, { "url": "https://git.kernel.org/stable/c/7d9211678c0f0624f74cdff36117ab8316697bb8" }, { "url": "https://git.kernel.org/stable/c/a01e60a1ec6bef9be471fb7182a33c6d6f124e93" }, { "url": "https://git.kernel.org/stable/c/bd43771ee9759dd9dfae946bff190e2c5a120de5" }, { "url": "https://git.kernel.org/stable/c/3bbe2019dd12b8d13671ee6cda055d49637b4c39" }, { "url": "https://git.kernel.org/stable/c/def5e7070079b2a214b3b1a2fbec623e6fbfe34a" }, { "url": "https://git.kernel.org/stable/c/36a9a0aee881940476b254e0352581401b23f210" }, { "url": "https://git.kernel.org/stable/c/c6f6f2444bdbe0079e41914a35081530d0409963" } ], "title": "rtnetlink: make sure to refresh master_dev/m_ops 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